Perform the operation. Write the answer as a fraction in lowest terms.
+ 
A. 
B. 3
C. 
D. 1
Answer: D
Mathematics
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Find the potential function f for the field F.F = - 
i + 
j - 
k
A. f(x, y, z) = 
- 
+ 
+ C
B. f(x, y, z) = 
+ C
C. f(x, y, z)= ln 
+ C
D. f(x, y, z) = ln (y - x - z) + C
Mathematics
Find the average value of 
over the given region.
over the rectangular solid in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 45
B. 
C. 
D. 
Mathematics
Find a linear function whose graph has the given slope and y-intercept.Slope - 
, y-intercept 
A. f(x) = 
x + 
B. f(x) = - 
x + 
C. f(x) = 
x - 
D. f(x) = - 
x - 
Mathematics
Eliminate the parameter t. Find a rectangular equation for the plane curve defined by the parametric equations.x = 5 tan t, y = 4 sec t; 0 ? t ? 2?
A. 
- 
= 1; -? < x < ?
B. 
+ 
= 1; -? < x < ?
C. y = x2 - 9; -3 ? x ? 3
D. y = 4
; -? < x < ?
Mathematics